HP HP-11C

Function Key Index
247
Number Alteration
Rounds
mantissa of 10-digit
number in X-register
to match display
setting (Page 42).
(ABS]Gives absolute
value of number in
displayed X-register
(Page 42).
Leaves only
integer portion of
number in displayed
X-register by
truncating fractional
portion (Page 42).
(FRAC]Leaves only
fractional portion of
number in displayed
X-register by
truncating integer
portion (Page 42).
Percentage
Percent.
Computes x% of
value in the Y-
register (Page 49).
Percent
Difference.
Computes percent of
change between
number in Y-register
and number in
displayed X-register
(Page 50).
Prefix Keys
Pressed before a
function key, selects
gold function printed
above that key (Page
21).
(g]Pressed before a
function key, selects
blue function printed
on the slanted face of
that key (Page 21).
CLEAR
cancels [fJand (9]
prefix keystrokes and
partially entered
instructions such as
[f)(sclor (g][HYPT].
Also displays 10-
digit mantissa of
number in displayed
X-register (Page 21).
Probability
(Py,x]Permutation.
Computes the
number of possible
ordered choices of y
different items taken
in quantities of x
items at a time with-
out repetitions (Page
52).
(Cy.x]Combination.
Computes the
number of possible
sets of y different
items taken in
quantities of x items
at a time without
repetitions or order
(Page 53).
Stack Manipulation
Exchanges
contents of X- and Y-
stack registers (Page
28).
(R¥]Rolls down
contents of stack
(Page 28).
Rolls up
contents of stack
(Page 28).
Clears contents
of displayed X-
register to zero (Page
17).
Statistics
CLEAR [Z]Clears the
statistics registers
(Ro through Rs) and
the stack registers to
zero (Page 55).
(X+]Accumulates
statistics of numbers
from X- and Y-
registers into storage
registers R through
Rs (Page 55).
Subtracts
statistics of numbers
in X- and Y-registers
from storage
registers R through